JP2880707B1 - Deodorant fabric - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To make a color and a pattern of a carrier fabric visible through a photocatalytic film by making a corrosion-resistant coating transparent in a case where a flexible fiber cloth is used as a carrier of a photocatalyst. Provided is a deodorizing cloth which can efficiently purify air as in the prior art, does not damage the carrier cloth with active oxygen at the time of generation, and can be easily processed into an interior such as a curtain or bedding. SOLUTION: A corrosion-resistant coating 11 having corrosion resistance to active oxygen is formed on a surface of a fabric F made of a synthetic fiber,
In the deodorizing cloth having a transparent photocatalytic film 12 made of a metal oxide having a photocatalytic function formed on the corrosion-resistant film 11, the corrosion-resistant film 11 is formed of a transparent film made of silicon dioxide, aluminum oxide or zirconium oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorant fabric using a fabric such as a woven fabric, a knitted fabric, or a non-woven fabric as a carrier of a deodorizing photocatalyst such as zinc oxide. It activates oxygen in the surrounding air, and this active oxygen is used to eliminate indoor odors and purify the environment.

[0002]

2. Description of the Related Art Oxygen in the surrounding air is activated by receiving light from the sun or a fluorescent lamp, and this active oxygen can eliminate odors in a room and purify the environment. An amorphous corrosion-resistant coating made of a corrosion-resistant metal such as titanium or silver alloy is formed on a textile fabric such as a woven fabric, a knitted fabric, or a nonwoven fabric made of polyester fiber by sputtering, and a metal oxide such as titanium oxide or zinc oxide is formed on the corrosion-resistant coating. It is known that a photocatalytic film having an amorphous structure made of a material is formed by sputtering (see JP-A-8-215295).

When the above-mentioned deodorizing cloth receives light in the air, a part of the light is reflected from the surface of the photocatalytic film or the surface of the corrosion-resistant film, thereby activating oxygen in the air. That is, since the light passes through the photocatalytic coating twice, it efficiently activates oxygen in the air, and this active oxygen decomposes various bacteria in the air, removes offensive odors and dirt, and cleans the environment. The corrosion-resistant coating protects the carrier fabric from active oxygen without being attacked by active oxygen itself, so that the carrier fabric does not become brittle.

[0004]

However, in the above deodorizing cloth, the corrosion-resistant coating provided on the surface of the carrier cloth is opaque, the appearance becomes iridescent, and the color and pattern of the carrier cloth do not appear on the surface. There was a problem.

The present invention provides a photocatalytic carrier using a flexible fiber cloth, wherein the corrosion-resistant coating is made transparent so that the color and pattern of the carrier cloth can be seen through the photocatalytic coating. In addition, the present invention provides a deodorizing cloth which can efficiently purify air as in the past and can be processed into an interior such as a curtain or bedding without the active cloth being affected by active oxygen at the time of generation. is there.

[0006]

According to the deodorizing cloth of the present invention, a corrosion-resistant coating having corrosion resistance to active oxygen is formed on the surface of a synthetic fiber cloth, and a photocatalytic function is provided on this corrosion-resistant coating. In the deodorant cloth on which a transparent photocatalytic film made of a metal oxide is formed, the corrosion-resistant film is a transparent film made of silicon dioxide, aluminum oxide or zirconium oxide.

The above-mentioned cloth is a flexible fiber cloth such as a woven, knitted or non-woven fabric made of synthetic fibers such as nylon fibers, polyester fibers, polyacrylonitrile fibers and aramid fibers. The above-mentioned synthetic fiber is particularly preferably a filament, and is used in the form of a monofilament yarn or a multifilament yarn in a woven or knitted fabric. In the present invention, these fiber cloths are used as a carrier for the photocatalyst, and it is preferable to perform appropriate dip dyeing or printing on the cloth in advance according to the use after forming the photocatalytic film.

The above-mentioned corrosion-resistant coating on the surface of the fabric is formed of transparent silicon dioxide, aluminum oxide or zirconium oxide, preferably silicon dioxide or aluminum oxide, which has excellent corrosion resistance to active oxygen and has light reflectivity. The thickness of the corrosion resistant coating is preferably from 10 to 1000 °, particularly preferably from 30 to 100 °. The thickness of this corrosion resistant film is 1
When the thickness is less than 0 °, the protective function of the carrier fabric becomes insufficient, and the carrier fabric is easily attacked by active oxygen. Conversely, when the thickness exceeds 1000 °, the cost increases and it is uneconomical.

This corrosion resistant film is formed by sputtering. That is, the fiber cloth is spread and placed in a closed chamber, and the anode and the target are arranged so as to face the surface thereof such that the anode is located between the fiber cloth and the target. However, the target is made in advance of silicon, aluminum or zirconium. Next, the inside of the closed chamber is decompressed to a vacuum of about 5 × 10 ⁻⁵ Torr, and an inert gas such as argon is introduced to form an inert gas atmosphere of about 5 × 10 ⁻⁴ Torr. Subsequently, oxygen was introduced and the pressure was 2 × 10
A mixed gas atmosphere of argon and oxygen of about ^-3 Torr is formed.

[0010] Thereafter, 5 Å between the anode and the target.
A glow discharge is generated by applying a DC voltage of 00 to 1000 V, and the generated argon ions collide with the target to strike silicon, aluminum or zirconium from the target, and scatter the oxygen ions in the mixed gas while scattering toward the fiber cloth. Then, the resulting silicon dioxide, aluminum oxide or zirconium oxide is adhered to the surface of the fiber fabric, and quenched to form a corrosion-resistant coating having an amorphous structure. Note that the target may be made of silicon dioxide, aluminum oxide, or zirconium oxide, and sputtering may be performed in an inert gas atmosphere. The above-mentioned fiber cloth was cooled from the back side with a water-cooled cylinder or the like to reach a temperature of 100
It is preferred that the temperature be kept at or below ° C.

The photocatalytic film on the corrosion-resistant film has excellent photocatalytic function and is formed of a metal oxide which efficiently activates oxygen in the air upon receiving light from the sun or a lighting lamp. Is an oxide of a transition metal such as titanium oxide (titanium dioxide), zinc oxide, and copper oxide. In particular, titanium oxide and zinc oxide are preferable because of their excellent photocatalytic function. The thickness of this photocatalytic film is 20 to
When the thickness is less than 20 mm, the desired photocatalytic function becomes insufficient. On the other hand, when the thickness exceeds 2000 mm, only the cost increases without improving the oxygen activation function, which is not economical.

The above-mentioned photocatalytic film is preferably formed by sputtering like the corrosion-resistant film. In this case, the obtained film has high strength and does not easily peel off. This sputtering can be performed in an inert gas atmosphere such as argon using the above-described metal oxide as a target.However, a single metal such as titanium or zinc is used as a target and the sputtering chamber is mixed with argon and oxygen. It may be kept in a mixed gas atmosphere and oxidized when a single metal scatters from the target. In this case, DC sputtering becomes possible. When a zinc oxide-based ceramic is used as a target, DC sputtering can be performed in an argon gas atmosphere.

[0013] The fabric having the above-mentioned corrosion-resistant coating is spread in a closed chamber during sputtering. At this time, it is preferable that the fabric is cooled from the back side with a water-cooled cylinder or the like, and the temperature of the fabric is preferably maintained at 100 ° C. or less, whereby a photocatalytic film having an amorphous structure is formed and the photocatalytic function is increased. Also, a single metal or metal oxide used for the target is cooled and sputtered in the same manner as described above to form a photocatalytic film on the corrosion-resistant film.

In FIG. 1, reference numeral 10 denotes the obtained deodorant cloth, F denotes a fiber cloth of a carrier, 11 denotes a corrosion-resistant coating, and 12 denotes
Is a photocatalytic coating. When light from the sun or a fluorescent lamp enters the photocatalytic film 12 of the deodorizing cloth 10, the light is reflected from the surface of the photocatalytic film 12 and the surface of the corrosion-resistant film 11, activating oxygen in the air at that time. Eliminates odors in the air,
Clean the environment. And the above-mentioned corrosion-resistant coating 11
The fiber fabric F is protected from active oxygen without being attacked by active oxygen. Moreover, since the corrosion-resistant coating 11 is transparent together with the photocatalyst coating 12, the color and pattern of the fiber fabric F can be seen from the photocatalyst coating 12 side and have a beautiful appearance.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 A woven fabric made of polyester multifilament yarn is used as a carrier fabric of a photocatalyst, and the woven fabric is refined and set.
Subsequently, it is dyed with a disperse dye, dried and heat set, and then a corrosion resistant film is formed on the surface by sputtering. FIG. 2 is a vertical cross-sectional view showing an example of a sputtering apparatus. A flat plate-like target 21 made of silicon is fixed on a hollow target source 22 with its surface facing upward at the lower part of a sealable chamber 20. The target 21 is cooled from below by the cold water passed through the source 22. Anodes 23 are horizontally installed above and below the target 21, and a DC power supply E supplies 500 to 1000 V between the anode 23 and the target 21.
Is applied.

A water-cooled cylinder 24 is horizontally and rotatably installed above the anode 23, a feed shaft 25 for the unprocessed fabric F is provided at the upper right, and a wound fabric F after processing is provided at the upper left. Each of the shafts 26 is installed horizontally and rotatably, the unprocessed fabric F wound around the delivery shaft 25 is drawn out, wound around the water-cooled cylinder 24 via the guide roller 27 at the upper right, and wound at the upper left. It is wound on a winding shaft 26 via a guide roller 28. A vacuum pump 29, a gas cylinder 30 for supplying argon gas, and an oxygen cylinder 31 for supplying oxygen are connected to the chamber 20, respectively.

In the above apparatus, the feed shaft 25, the take-up shaft 26 and the water cooling cylinder 24 are rotated, and the fabric F is fed clockwise at a predetermined speed while the water cooling cylinder 24 is rotated.
Cool with. On the other hand, the pressure inside the chamber 20 is reduced to about 5 × 10 ⁻⁵ Torr by driving the vacuum pump 29, and then the pressure inside the chamber 20 is adjusted to about 5 × 10 ⁻⁴ Torr by introducing argon gas from the gas cylinder 30. And oxygen cylinder 3
Oxygen is introduced from 1 to increase the pressure in the chamber 20 to 2 × 10 ^−3.
Torr, and then a DC voltage is applied between the anode 23 and the target 21 so that the target 2
1 is made to fly out of silicon, and this silicon is reacted with oxygen in the chamber 20 to form silicon dioxide. The silicon dioxide is deposited on the fabric F to form an amorphous corrosion-resistant coating 11.
To form At this time, the feed speed of the woven fabric F is adjusted so that the thickness of the corrosion-resistant coating 11 is 10 to 1000 °.

When the sputtering process proceeds in this way and the entire fabric F wound around the delivery shaft 25 has been transferred to the winding shaft 26, the target 21 is changed from a silicon plate to a titanium plate, and the target 21 is again formed. Similarly, the inside of the chamber 20 is adjusted to the above-described mixed gas atmosphere of argon and oxygen, and thereafter, a DC voltage is applied between the anode 23 and the target 21 to cause titanium to fly out of the target 21.
This titanium is oxidized, and the titanium oxide is deposited on the corrosion-resistant film 11 of the fabric F to form a photocatalytic film 12 having an amorphous structure.
Deodorizing cloth 1 having a titanium oxide photocatalytic coating 12 on a woven fabric F via a silicon dioxide corrosion-resistant coating 11
Get 0. At this time, the feed speed of the fabric F is adjusted so that the thickness of the photocatalytic film 12 is set to 20 to 2000 °.

Second Embodiment In the first embodiment, an aluminum oxide corrosion-resistant coating is formed on the fabric F by using aluminum instead of silicon as the target 21 during sputtering at the time of forming the corrosion-resistant coating. Similarly, a titanium oxide photocatalytic film is formed, and a corrosion-resistant film is obtained by using aluminum oxide and the photocatalytic film is formed by using titanium oxide.

Third Embodiment In the first embodiment, when sputtering is performed at the time of forming a photocatalytic film, zinc is used as the target 21 instead of titanium, so that the corrosion-resistant film 11 made of silicon dioxide is used.
A photocatalytic film made of zinc oxide is formed thereon, and a deodorizing cloth made of silicon dioxide as the corrosion-resistant film and zinc oxide as the photocatalytic film is obtained.

Embodiment 4 In Embodiment 1, an aluminum oxide corrosion-resistant coating is formed on the fabric F by using aluminum instead of silicon as the target 21 at the time of sputtering when forming a corrosion-resistant coating. On the other hand, at the time of sputtering at the time of forming the photocatalytic film, a zinc is used instead of titanium as the target 21 to form a photocatalytic film made of zinc oxide, the corrosion-resistant film is aluminum oxide, and the photocatalytic film is zinc oxide. obtain.

[0022]

Example 1 A deodorant fabric was produced by the method of the first embodiment. Carrier fabric F
After the refining and setting, a polyester dye taffeta was used as a liquid dyeing machine (“Circular dyeing machine
"Z-type") and a mixed dye having the following formulation (% by weight based on the weight of the fabric), and dyed brown at a bath ratio of 1:20. That is, the temperature is raised from room temperature to 130 ° C., and after maintaining the temperature for 30 minutes, the temperature is lowered to 80 ° C., and the dyeing liquor is discharged.
Soaping and hot water washing were performed, followed by drying at 130 ° C. for 2 minutes and heat setting at 180 ° C. for 1 minute. Disperse dye (Sumitomo Chemical Co., Ltd., "Sumikaron Yellow") 0.67% Disperse dye (Sumitomo Chemical Co., Ltd., "Sumicaron Red") 0.72% Disperse dye (Sumitomo Chemical Co., Ltd., "Sumicaron Blue") 0.25% PH adjuster (Nichika Chemical Co., Ltd., "Benelap HE") 0.50% Acetic acid 0.50%

On the above-mentioned woven fabric F dyed brown, a corrosion-resistant coating 11 made of silicon dioxide and having a thickness of 60 ° was formed by sputtering. That is, sputtering was performed using a silicon plate as the target 21 in a mixed gas atmosphere of argon and oxygen. Thereafter, the target 21 was replaced with a titanium plate, and sputtering was performed in the same manner to form a 1500 ° thick photocatalytic film 12 of titanium oxide on the corrosion-resistant film 11. In addition, the temperature of the target 21 was maintained at 10 ° C. and the temperature of the fabric F on the water cooling cylinder 24 was maintained at 40 ° C. by flowing cold water through the target source 22 and the water-cooled cylinder 24.

The resulting deodorant fabric 10 had a beautiful brown appearance almost the same as before the sputtering, and was suitable for curtains and bedding. When a commercially available packing gum tape was stuck on the photocatalytic film and a peeling test was performed, no peeling was observed in any of the photocatalytic film and the corrosion-resistant film. Next, the deodorant cloth of the above example was cut into a predetermined size,
a, the sample Fa is suspended in the test chamber 35 shown in FIG. 3, and while the sample Fa is irradiated with the black light 36 in the chamber 35, a predetermined amount of acetaldehyde sealed in the chamber 35 is supplied to the pump 37 and the pump 37. The gas was circulated through a circulation pipe 38, and after 250 hours, the concentration of acetaldehyde was measured by a gas densitometer 39. In addition, the same test was performed on the woven fabric of Comparative Example 1 having no photocatalytic coating or corrosion-resistant coating. The results are shown in Table 1 below.

Table 1 Example Comparative Example 1 Initial concentration (ppm) 100 100 Concentration after 250 hours (ppm) 75 85

As shown in Table 1, the deodorizing cloth of the example activates oxygen in the chamber 35 by irradiation with black light and decomposes acetaldehyde by this active oxygen. It could be reduced by 10%.

Further, the corrosion-resistant coating 11 is formed on the woven fabric F.
(Silicon dioxide, thickness 60 °) and photocatalytic coating 12 (titanium oxide, thickness 1500 °), deodorant cloth of Example, Comparative Example 1 consisting of only woven fabric F, corrosion-resistant coating on woven fabric F 11 (silicon dioxide, thickness 60 °) only and Comparative Example 3 in which only the photocatalytic coating 12 (titanium oxide, thickness 1500 °) was provided on the fabric F,
Irradiate ultraviolet light with fluorescent light (40W) from a distance of 15cm,
The tear strength of the sample after irradiation for 90 consecutive days was measured with a Shopper type tear tester, and the tear strength preservation rate was calculated.
The results are shown in Table 2 below.

Table 2 Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Initial tear strength (g) 2100 2100 2100 2100 Tearing strength after 90 days (g) 1950 2000 2050 1080 Tearing strength storage rate (%) 93 95 98 51

As shown in Table 2, in Comparative Example 3 in which only the photocatalytic film 12 was provided, the tear strength preservation rate was reduced to about 影響 due to the influence of active oxygen. The example in which both were provided exhibited almost the same preservation rate as Comparative Example 1 having no coating and Comparative Example 2 having only the corrosion-resistant coating 11, and were found to be hardly affected by active oxygen.

[0030]

As described above, in the deodorant cloth of the present invention, since the colors and patterns of the cloth can be seen from the photocatalytic film, various appearances can be obtained by changing the colors and patterns. Moreover, it has a photocatalytic function to efficiently purify air, and the fabric is not attacked by active oxygen at the time of generation, and it is durable and can be processed for curtains, bedding and other interiors, Excellent as a deodorant fabric.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of a sputtering apparatus.

FIG. 3 is a cross-sectional view of a test device for a photocatalytic function.

[Explanation of symbols]

 F: Cloth (fabric) Fa: Sample 10: Deodorant cloth 11: Corrosion-resistant coating 12: Photocatalytic coating 20: Sputtering chamber 21: Target 22: Target source 23: Anode 24: Water-cooled cylinder 25: Delivery axis 26: Winding Shaft 29: Vacuum pump 30: Gas cylinder 31: Oxygen cylinder 35: Test chamber 36: Black light 37: Pump 38: Circulation pipe 39: Gas concentration meter

Continued on the front page (72) Inventor Sadao Kuroki 36, Hamacho, Gamagori-shi, Aichi Suzutorai Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) A61L 9/00-9/22 B01D 53 / 86 D06M 11/45

Claims (3)

(57) [Claims] An anti-corrosion film having a corrosion-resistant and light-reflective coating formed on the surface of a synthetic fiber fabric, and a transparent photocatalytic coating made of a metal oxide having a photocatalytic function formed on the corrosion-resistant coating. A deodorant cloth, wherein the corrosion-resistant coating is a transparent coating made of silicon dioxide, aluminum oxide or zirconium oxide. 2. The deodorant fabric according to claim 1, wherein the thickness of the corrosion-resistant coating is 10 to 1000 °. 3. The deodorant cloth according to claim 1, wherein the corrosion-resistant coating and the photocatalytic coating are each formed by sputtering.